Photoshop CS3 Extended Plug-in for Google 3D Warehouse is a free plug-in that enables you to search and download 3D models from Google 3D Warehouse directly from Adobe Photoshop CS3 Extended.
Once you have downloaded the plug-in, you can search Google 3D Warehouse from Photoshop CS3 Extended by going to File>Automate>Search Google for 3D Model. After saving the file, the plug-in will convert the 3D model into a format that Photoshop reads (in this case KMZ, Photoshop also supports .3ds, .obj, .dae and .u3d) and then the model will open in Photoshop CS3 Extended as a 3D layer. NOTE: If you try to open a large 3D model (over 5MB for the zipped file shown on 3D Warehouse), the conversion & opening process will be very slow. We recommend downloading models under 5 MB on Google 3D Warehouse.